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/*
* Copyright 1999-2004 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* $Id$ */
package org.apache.fop.fo.flow;
// Java
import java.util.List;
// XML
import org.xml.sax.Attributes;
import org.xml.sax.Locator;
import org.xml.sax.SAXParseException;
// FOP
import org.apache.fop.fo.CharIterator;
import org.apache.fop.fo.FONode;
import org.apache.fop.fo.FObj;
import org.apache.fop.fo.OneCharIterator;
import org.apache.fop.layoutmgr.CharacterLayoutManager;
/**
* This class represents the flow object 'fo:character'. Its use is defined by
* the spec: "The fo:character flow object represents a character that is mapped to
* a glyph for presentation. It is an atomic unit to the formatter.
* When the result tree is interpreted as a tree of formatting objects,
* a character in the result tree is treated as if it were an empty
* element of type fo:character with a character attribute
* equal to the Unicode representation of the character.
* The semantics of an "auto" value for character properties, which is
* typically their initial value, are based on the Unicode codepoint.
* Overrides may be specified in an implementation-specific manner." (6.6.3)
*
*/
public class Character extends FObj {
/** constant indicating that the character is OK */
public static final int OK = 0;
/** constant indicating that the character does not fit */
public static final int DOESNOT_FIT = 1;
private char characterValue;
/**
* @param parent FONode that is the parent of this object
*/
public Character(FONode parent) {
super(parent);
}
/**
* @see org.apache.fop.fo.FONode#validateChildNode(Locator, String, String)
* XSL Content Model: empty
*/
protected void validateChildNode(Locator loc, String nsURI, String localName)
throws SAXParseException {
invalidChildError(loc, nsURI, localName);
}
/**
* @see org.apache.fop.fo.FObj#addProperties
*/
protected void addProperties(Attributes attlist) throws SAXParseException {
super.addProperties(attlist);
characterValue = propertyList.get(PR_CHARACTER).getCharacter();
getFOEventHandler().character(this);
}
/**
* @see org.apache.fop.fo.FObj#charIterator
*/
public CharIterator charIterator() {
return new OneCharIterator(characterValue);
// But what if the character is ignored due to white space handling?
}
/**
* @see org.apache.fop.fo.FONode#addLayoutManager(List)
*/
public void addLayoutManager(List list) {
String str = getPropString(PR_CHARACTER);
if (str.length() == 1) {
CharacterLayoutManager lm = new CharacterLayoutManager(this);
list.add(lm);
}
}
/**
* @see org.apache.fop.fo.FObj#getName()
*/
public String getName() {
return "fo:character";
}
/**
* @see org.apache.fop.fo.FObj#getNameId()
*/
public int getNameId() {
return FO_CHARACTER;
}
}
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